Effects of laser shock processing on mechanical properties of Fe–Ni alloy

The effects of laser shock processing (LSP) on nano-hardness, elastic modulus and surface residual stress of Fe–Ni alloy were investigated. The values of nano-hardness, elastic modulus of the Fe–Ni alloy after LSP were measured by the nano-indentation technology, and the surface residual stress was...

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Published in:Materials in engineering 2009-10, Vol.30 (9), p.3673-3678
Main Authors: Lu, J.Z., Zhang, L., Feng, A.X., Jiang, Y.F., Cheng, G.G.
Format: Article
Language:English
Subjects:
Elastic modulus
Fe–Ni alloy
Laser shock processing (LSP)
Nano-hardness
Nano-indentation
Residual stress
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description The effects of laser shock processing (LSP) on nano-hardness, elastic modulus and surface residual stress of Fe–Ni alloy were investigated. The values of nano-hardness, elastic modulus of the Fe–Ni alloy after LSP were measured by the nano-indentation technology, and the surface residual stress was determined by XRD with sin 2 ψ method, and scanning electron microscopy (SEM) observations of the microstructure before and after LSP were carried out. Experimental results showed that the values of the nano-hardness, elastic modulus and surface residual stress in the laser-shocked region and the laser-affected region were obviously improved compared to those in the non-shocked region. The mechanisms underlying the improved nano-hardness, elastic modulus and surface residual stress were also addressed.
doi_str_mv 10.1016/j.matdes.2009.02.015
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subjects Elastic modulus
Fe–Ni alloy
Laser shock processing (LSP)
Nano-hardness
Nano-indentation
Residual stress
title Effects of laser shock processing on mechanical properties of Fe–Ni alloy
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